Expect her to have a ton of gas for a while. Walking will help a lot. The second night after my reversal, I actually ended up walking from about 10PM to 7AM the next morning. Not constant, of course, but very regular walking, as that was the only thing that kept the gas at bay. Then, when I finally had a bowel movement (and yes, the nurses will ask just about every time they see her), the flood gates opened and I think I had something like 12 movements in the space of about 10 hours. The surgeon finally relented after the nurses told him and had me take something to reduce the frequency.
I also kept on the same diet I had while I had the ileostomy for about a month after I got home. My wife and I introduced new foods slowly, and I also kept fibrous foods to a minimum during that time. I can't tell you how happy I was to finally be able to eat the various veggies that I loved to have.
The gas stayed on for a while, probably about a month or so, then finally just disappeared.
Make sure she stays just as hydrated as she did while she had the bag. I went on a Mexican cruise this past January and made the mistake of too little water and too much wine, got a little dehydrated, and ended up with a small bowel obstruction. Painful, but easily quickly and easily treated by just bags and bags of IV fluids and a liquid diet for a while, but still a valuable lesson about something to avoid at all costs.
One other thing. Make sure she takes a multivitamin. Not sure of her age, but your daughter's weight seems a little on the low side. I was underweight after my initial surgery, and also anemic, so I took (and still do take) a multivitamin with iron. That seems to have helped me quite a bit, as my hemoglobin level is back to normal now.
Please wish her good luck and good health!